新增IE浏览器版本过低提示页面

ruoyi-ui/public/index.html

@@ -7,6 +7,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
     <link rel="icon" href="<%= BASE_URL %>favicon.ico">
     <title><%= webpackConfig.name %></title>
+    <!--[if lt IE 11]><script>window.location.href='/html/ie.html';</script><![endif]-->
 	  <style>
     html,
     body,